Bicycle



FIG. 1 is a side elevational view of a bicycle showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof; and

FIG. 6 is a side elevational view thereof opposite to that shown in FIG. 1. 

The ornamental design for a bicycle, substantially as shown and described. 